MECHANOSENSITIVE AFFERENT UNITS IN THE LUMBAR INTERVERTEBRAL DISC AND ADJACENT MUSCLE

被引：67

作者：

YAMASHITA, T

MINAKI, Y

OOTA, I

YOKOGUSHI, K

ISHII, S

机构：

[1] Department of Orthopaedic Surgery, Sapporo Medical University, Sapporo

[2] Department of Physiology, Sapporo Medical University, Sapporo

来源：

SPINE | 1993年 / 18卷 / 15期

关键词：

LUMBAR INTERVERTEBRAL DISC; MECHANOSENSITIVE UNIT; NOCICEPTION; PROPRIOCEPTION;

D O I：

10.1097/00007632-199311000-00018

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

The purpose of this study was to characterize the somatosensory units of the lumbar intervertebral disc and adjacent muscle. A laminectomy was performed on the lumbar spine of adult male Japanese White rabbits. Receptive fields of mechanosensitive afferent units were investigated in the intervertebral disc and adjacent muscle, and electrophysiologic recordings were obtained from filaments of the dorsal root. Thirteen mechanosensitive units were identified: three units in the intervertebral disc area, and 10 units in the psoas muscle. Of the three units in the disc area, one was identified at the surface of the L5-6 anulus fibrosus and two at the insertion of the anulus fibrosus to the L5 and L6 vertebral bodies. These three units belonged to Group III and had very high mechanical thresholds, more than 160 g. The 10 units in the psoas muscle belonged to Groups II, III, and IV, and had mechanical thresholds ranging from 0.22 to 12.6 g. The units in the disc area may serve as nociceptors sensitive to strong noxious stimulation that could traumatize the tissue. The units in the psoas muscle may contribute to nociception and proprioception.

引用

页码：2252 / 2256

页数：5

共 21 条

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